Prison-door operator



J. B. STRAUSS PRISON DOOR OPERATOR- May 6, 1930.

2 'sneets-she't 1 v Filed May '7, 1925 May 6, 1930. J. a sTRAuss 1,757,751

PISON DOOR OPERATOR v Filed May 77,1925 2 sheets-sheet 2 ,1p I g 1 J1 1ot .l l f 6 l 15.4 14 L Z y Y l a. uw 9 l e .i @E1 "Jf'h 10g Patented May 6, 1930 l UNHED- sV Josnrn- B. vsfraAUss, or CHICAGO,k ILLINOIS l raison- Doon OPERATOR y gappueaaon mea May '7,

f Thisinvention relates to prison doors, and` has forits ob'je'ct'to provide a new: and improved device of this: description. 1

" The invention has as a'further "object to provide-a strong, durable `door which can at the saine Ytime Abe 'easilyV and quickly con-` trolled. 1

The invention has ifnrth'er"objectsV which' are more particiilarlyset 'forth in the following description.A

Referring to the drawings:

Fig. 1 is a front elevation;showing.oneA

the frame orV frame pieces. 2*; the frame isv Y preferably of metal and is anchored to the masonry 3. rlhe closing part lfis provided is provided With guide rollers 5 and 5a Which engage opposite sides of the edge of the closing part, as shown in Fig. f2, along which the closing part rolls as it is lifted and lowered.

au' This closing part has at` its edges the laterally projecting members 1EL and 1b, the racks 4 and 4ta being connected to these members la and 1b. The rollers 5 and 5a engage the edges of the racksV 4 andla and have iiangesv 6, which project along the faceof the parts 4 and 4a, so as to preventdisengagement of Y the rollers With the door. Some suitable means is provided for counterweighting the f closingpart 1. Inthe construction shovvn,`' the racks 4 and 4a engage the `rack Wheels' 7 and 7*l at opposite sides of themopening.

These rack Wheels 7 and 7a are also engaged by the counterweight racks 8 and 8a. The

counterweight racks have counteryveights 9 and 9a attached thereto, said counterWeights preferably being providedfWith grooves, in-

to which portions ofthe gears 7 and Ware received (see Fig. 2). The countervveig'hts are provided With guide rollers. 10 and 10a,` Which engage guides 11a. VThese guides are at its edges With theV racks 4 and 4a, the frame.

1925." serial No. 25,630.'

preferably .formed by parts of 4theframe i pieces 2 Which are hollow-and providedwith slotsy along V.oneside into which Ithe ,guide rollers project', said-guide rollers being pro*y vided vWith flanges ;12,.1Whichfengage the facesof ftheguides 11v and 11B; The'gear 7.

has connected therewith a 'bevelr' geargl,

which engages a bevel gear'l'?)aand is con-` nected. to a shaft "14 Vextending along the v' frame piece 2,"sai'd.` shaft havingat the other end a bevel gear 15, Which engagesa bevel gearlon a shaft 17 Whichentendscross-4 Wise 'abovethezclosing part" 1. This shaft I hasf at its end abevel gear .18.' which .engages a.beve'l gear 19. These two 'bevel'gearsengagea bevel Vgear 151on the shaft 14?, said latter shaft beingrprovided'witha b evelgearfV 1 13b. which engages kabevel gear lfconnected The bevel gear'lQQ with lthe rackf Wheel 17?; is :connected fl with .a i driving'. shaft .'20 l'driven fromSome'zsnitablesourcel of power; as vfor examplethe lfelectric; motor 21. There fis ya speed reducing device' 22.'.interposedbetweenV themotor.A and thev shaft 2Qiso;as toisecnrejtheproper speed 'of rotation forrthe bjevel gear 191 and the parts driven therefrom'vvhieh lift and lower thedoor. vThe ym'otorvirs also ypref;-l

erably `provided vvithabral're23. Agsw'vitch Afor controlling" the'motor mayrrbe located at anydesired point. The mechanism shown isl such Vthatthe door .will be locked inits closed-position. An additionallocking means may` be used iffdesired.j

- The'fuseand operation of niysi'nvention are asffolloxvs: ff u 1 Wreath@ fdoo'ffis pciosedgaada is desired to -openfit thegsrvitchcontrolling the' motor.

21 isclosed so as to set said 'fmotor-in` opera- 'tionL' 'This motor, through. the speed reducing device 22,'rotates thelbevell gear 119. This causes. the bevel `gear L152L to rotate thereby.

rotatingthe shaft 111-EL andfbeve'l gear 13'?,

which by itsengagement-zWith 'bevel vgear l-rotatesthe rack-Wheel 7a. fAt the same tinietherack? Wheel i7, is rotatedv by.` the :bevel gearlS, zsh'aftl?, bevel gears V`16 and 15, shaft l4andfbevel gearslia and 113; TheV rotation vof the Vraclrfwheels `7 and ''or by, engagement With the 1racks:onitheclosing device and .the

counterweightsf*causes the 'closing'. device yor i r doorgto be lifted and the counterweights to be lowered. vWhen the door is lifted tothe proper height the motoris stopped. When' it is desired to lower the door the motor is ref versed and'tliis, through the parts hereinbefore described causes the doorto be lowered and the counterweightsL to` be raised. The brake 23 acts also when in operation to lock V the parts in any desired position.

It will thus be seen thatv I have here a` strong, durable, easily operatedand eliicient door or closing device for prisons.

lclaim:v l. A prison door comprising a frame, a closing part adapted to slide along said part, a vertical shaftl at eachv side of said frame, a horizontal shaft 4connecting,V them, all of said shafts being connecte'dwith said motor, Va driving'conne'ction .between said `vertical shaftsand two sides of said closing part, whereby the closing part mayfberecip# rocated alongsaid frame.

2. A'prisondoor comprising a closing partV adaptedto be lifted and lowered, afpair of Y toothed racks on the sides ofsaid'closing part,

a pinion associated with each rack, a toothed counterweight located at `ione`side of the closing part and in a'vertical .plane-extending' with, apart to be-liftedconnected to one of said racks, avcounterweight connected tov the other rack, said counterweight being channel shaped and partly enclosing` said pinion.

7. A lifting mechanism comprising a pinion, a pair of toothed racks .engaging therewith, a part tobe lifted connectedto one of saidracks, a. counterweight connected tothe Y other rack, saidcounterweighthaving; arecess, the rack located within' said recess.

8. A- prisonfdoor comprising a closingpart,

adapted to vbe lifted and lowered, a toothed rack on each side of said closing part, a pinion associated` with` each'rack, a toothed coun- 5 terweight associated with the pinion and means for rotating the ,pinion to. raise and lower the closing part, lsaid means comprisi4 ing operating; mechanism associated with ,the

pinion, and guiding "devices for said ,closing ,i

partl and `counterweigfht comprising rollers,

the axes oftherollers for the jcounterweiglfit` beingV at right angles to the axes of the rollers of the closing part.y Y v M Signedfat Chicago, county `of Cook, and State oflllinois, this 1st day of May, l925. l JOSEPH'vBSTRAUSS.

'through said closing part associated with the n pinion and: means for rotating' the pinion to raise andlower the closingpart;

3. A prisondoor comprisingaclosing' part adapted to be lifted and lowered, apair of toothed racks on the sides of f said closing' said means comprising operating mechanism associated with the pinion. c v Y 4. A prison door-comprising` avmetal frame, a closing part associated therewith, toothed racks at the sides thereof,` a-pinionin the vplane of the closingpart and engaging said racks, a counterweight located at one side of theclosing, part and in a vertical planeextending throughsaid closing part, a rack in A said coiinterweight engaging said pinion and means for operating the parts to yraise andv lower the closing part. Y

5. A Vprison door comprising a central 4 frame, a facing on eitherv side .ofA saidcentral' frame,.toothed racks at the sides thereof, a v

closing part, pinions inthe plane of the Clos-y ing part and engagingsaid racks, ak recessed counterweight on each side Ofcsaid closing part, a rack in said counterweight engaging` in the recess of eachpinion and means for operating the parts to raise and lower the closing part. l

6. A lifting mechanism comprising a pinion, a', pair of toothed racks engaging there- 

